/* ── Base & Utilities ── */
html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* ── Nav Link Hover Dot ── */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scale(0);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #0d9488;
    transition: transform 0.2s ease;
}

.nav-link:hover::after {
    transform: translateX(-50%) scale(1);
}

/* ── Header Scroll State ── */
#site-header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

#site-header.scrolled .nav-link {
    color: #334155;
}

#site-header.scrolled .nav-link:hover {
    color: #0d9488;
}

/* ── Mobile Menu Transition ── */
#mobile-menu {
    animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Feature Cards ── */
.feature-card {
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
}

/* ── Image Hover Zoom ── */
.rounded-2xl.overflow-hidden {
    overflow: hidden;
}

.rounded-2xl.overflow-hidden img {
    transition: transform 0.5s ease;
}

.rounded-2xl.overflow-hidden:hover img {
    transform: scale(1.05);
}

/* ── Button Focus ── */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
}

/* ── Mobile Menu Active State ── */
.mobile-link {
    display: block;
    width: 100%;
    text-align: left;
}